Welcome to our Sinus Tachycardia reference page. This page provides a summary definition followed by introductions to our practice drills, quizzes, lessons and interactive guides.
Definition of Sinus Tachycardia
Sinus Tachycardia is characterized by a pulse rate of more than 100 beats per minute in adults.
The electrical signals originate in the sinoatrial (SA) node.
Appropriate sinus tachycardia can result from exercise, alcohol or caffine, drugs and anxiety.
Inappropriate Sinus Tachycardia
Inappropriate Sinus Tachycardia is fairly rare.
It can result from hypotension, hupoxia, congestive heart failure,
bleeding, cardiomyopathy, myocarditis, anemia and fever.
Sinus Tachycardia EKG Strip
The following table summarizes the key features of an sinus tachycardia EKG rhythm strip.
|Rate||Fast (> 100 bpm)
|P Wave||Normal, may merge with T wave at very fast rates
|PR Interval||Normal (0.12-0.20 sec)
|QRS||Normal (0.06-0.10 sec)
|Notes||QT interval shortens with increasing heart rate
EKG Training - Introduction
A good starting point for learning EKG interpretation is our EKG Basics training course. The course provides training on the key features of an EKG tracing. These features include observing P-wave forms, measurement of EKG intervals and segments, assessment of rhythm, calculating heart rate, and the evaluation of other relevant wave segments. The arrhythmia practice drills allow students to build skills interactively.
EKG Practice Drills
The heart arrhythmia practice drills provide a test EKG tracing and users are asked to identify the type of arrhythmia. Many of these drills include tachycardia EKG tracings. Each answer is immediately evaluated and the correct classification of the EKG tracing is provided, along with a detailed explanation. A directory of arrhythmias is also provided.
Arrhythmia Practice Drills
The quiz is structured like a classroom exam. The quiz present twenty EKGs. Users answer each question and at the end of the quiz, a fully graded report is provided. This graded report provides scoring as well as the correct answer to each question. Top scores and mean scores are also provided. This quiz draws its questions from a library of over 300 EKGs, allowing users to take the quiz multiple times.
ECG Monitor Challenge (beta version)
Try the beta version of our ECG monitor challenge. This quiz uses a simulated patient monitor with moving waveform instead of a paper tracing. As with the quiz described above, twenty questions are presented, then a graded report is available.
ECG Monitor Challenge